» All About Wildflowers
Conservation Volunteers Northern Ireland provides a list of wild flowers likely to be seen in the countryside with a photograph and information on each.
» Contact-Poisonous Plants of the World
Descriptions and images of plants that are harmful when touched, including powerful tropical relatives of stinging nettle and poison-ivy.
http://mic-ro.com/plants/
» Don's English Wild Flower Collection
Hobby wildflower photographer shares some of his pictures of flowers growing in South Derbyshire. Includes a few reproductions of pressed English wildflowers from 1857.
http://www.dagood.co.uk
» East Asian Flora Web
Information and exchange of plants of Southeast Asia and Australasia.
» Killerplants
Brief articles about plants and their interactions with people.
http://www.killerplants.com/
» Native Flora of Samsonvale, Queensland, Australia
Personal site with images, flowering calendar, invasive weed management, and wildlife of a registered 'Land for Wildlife' acreage block near Brisbane.
http://www.hotkey.net.au/~aviceda/
» Orchids of Lincolnshire
Descriptions and photographs of orchids to be found in the county.
» PlantZAfrica
Includes information about plants native to southern Africa and related topics by the National Botanical Institute of South Africa.
http://www.plantzafrica.com/
» S-weeds
Photographic journal of exploration of the weeds in the vicinity of Eva Ekeblad's home in Göteborg, Sweden.
http://www.s-weeds.net/
» The Nature Forums
Many nature-related topics are discussed here. Includes a forum for uploading plant photos for identification.
http://www.nature.net/forums/
» UK Flora for Fauna
Plant distribution records grouped by UK postcode; checklists of British native plants, butterflies, bumblebees, and mammals; gardening for bumblebees.
» Wildflowers and Weeds
Thomas J. Elpel, the author of Botany in a Day, provides a guide to identifying plants by families.
http://www.wildflowers-and-weeds.com/
» Wildflowers in Buxton, England
Botany and wild flowers in Buxton, Derbyshire Peak District. Includes deciduous woodland, river valley, moorland heath, and grassland.